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[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (Signal: A Secure, Open Source Messaging App)
[#]: via: (https://itsfoss.com/signal-messaging-app/)
[#]: author: (Ankush Das https://itsfoss.com/author/ankush/)
Signal: A Secure, Open Source Messaging App
======
**_Brief: Signal is a secure open-source messaging app for smartphones. It also offers a standalone desktop app for Linux, Windows, and macOS_. _Here, we take a look at its features and usability._**
### Signal is an Excellent Alternative to WhatsApp (and Telegram) for Privacy Concerned People
![Signal App On Linux][1]
Signal is an open source application with a keen focus on privacy. It is recommended by privacy advocates like [Edward Snowden][2].
It may not have as many features as Telegram or WhatsApp but if you want to enhance your privacy while having a conversation, this is a solid open-source solution.
You can install it on your smartphone ([iOS][3]/[Android][4]) and it is also available for Linux, Windows, and macOS.
### Features of Signal Messenger
**Note:** _Some of the features are specific/exclusive to smartphones. You may not observe all the features mentioned in the desktop app._
As I already mentioned, this is tailored to enhance your privacy. So, the user experience may not be the “best” youve ever seen. But, privacy/security-wise, I think it is a good option to have.
![Signal Features][5]
#### Disappearing Messages
You can set a timer for messages in a conversation so that it will be automatically deleted as per the timer.
Essentially, anyone in the conversation can activate this feature. So, you control if the messages should stay in a conversation or disappear.
#### Use it As Default SMS App
If you want to utilize an open-source app for all your SMSs, you can simply go to Signals app settings and set it as the default for SMS and MMS.
#### Screen Security
Theres a neat feature to block screenshots in-app, “Screen Security”.
If you enable it, you wont be able to take a screenshot of any conversation in the app. You can find the option to enable or disable it from the app settings.
It may not be useful to everyone but you can try it out.
#### Safety Number
If you want to verify the security of your encryption with a friend, you can simply tap on the profile and scroll down to find “View Safety Number”.
You can either scan it to verify or simply take a look at it to mark it verified.
#### Locked Messages
If you protect the app with a lock (pin/fingerprint), even if your device has been unlocked, you wont be able to see the messages on your notifications.
So, when you get a notification while Signal is locked, you will notice the content of the notification as “**Locked Message**” which is a plus for privacy-oriented users.
#### Other Features
![][6]
As you would expect in a messaging app you get a couple of stickers to utilize and you can also create a group if you want.
However, you wont have the ability to moderate your group you can just add members and change the profile picture.
In addition to this, Signal also supports biometric security for its app.
### Installing Signal on Ubuntu/Linux
Unfortunately, you dont get a .**deb** or .**AppImage** to install it on your Linux distro. So, you will need to utilize the terminal as per the [official installation instructions][7].
Heres what you have to type in the terminal:
```
curl -s https://updates.signal.org/desktop/apt/keys.asc | sudo apt-key add -
echo "deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main" | sudo tee -a /etc/apt/sources.list.d/signal-xenial.list
sudo apt update && sudo apt install signal-desktop
```
Simply copy-paste the commands one by one in the terminal and you should be good to go.
[Download Signal for Other Devices][7]
### My Thoughts On Signal
Ive been using Signal for a few years now and it has improved with what it offers. However, I still feel that the user experience can be improved.
Privacy-wise, it is definitely a good alternative to what we already have (in my opinion). You can give it a try and see how well it works for your usage.
You can also take a look at their [GitHub page][8] for the latest developments and beta releases if you want to try them out.
Signal app may not be a popular messaging app when compared to WhatsApp or even [Telegram on Linux][9]. But, you can try it for yourself and encourage your friends to use an open-source messaging app.
Have you tried it yet? Let me know what you think about the Signal app in the comments below.
--------------------------------------------------------------------------------
via: https://itsfoss.com/signal-messaging-app/
作者:[Ankush Das][a]
选题:[lujun9972][b]
译者:[译者ID](https://github.com/译者ID)
校对:[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://itsfoss.com/author/ankush/
[b]: https://github.com/lujun9972
[1]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/12/signal-shot.jpg?ssl=1
[2]: https://en.wikipedia.org/wiki/Edward_Snowden
[3]: https://apps.apple.com/us/app/signal-private-messenger/id874139669
[4]: https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms&hl=en_IN
[5]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/12/signal-phone.jpg?ssl=1
[6]: https://i2.wp.com/itsfoss.com/wp-content/uploads/2019/12/signal-shot-1.jpg?ssl=1
[7]: https://signal.org/download/
[8]: https://github.com/signalapp
[9]: https://itsfoss.com/install-telegram-desktop-linux/

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@ -0,0 +1,122 @@
[#]: collector: (lujun9972)
[#]: translator: (geekpi)
[#]: reviewer: ( )
[#]: publisher: ( )
[#]: url: ( )
[#]: subject: (Signal: A Secure, Open Source Messaging App)
[#]: via: (https://itsfoss.com/signal-messaging-app/)
[#]: author: (Ankush Das https://itsfoss.com/author/ankush/)
Signal安全、开源的聊天应用
======
** _简介Signal 是一款智能手机上的安全开源聊天应用。它还提供了适用于 Linux、Windows 和 macOS 的独立桌面应用。在本文中我们来看看它的功能和可用性。_**
### 对于关注隐私的人来说Signal 是 WhatsApp和 Telegram的绝佳替代品
![Signal App On Linux][1]
Signal 是一款关注隐私的开源应用。像[爱德华·斯诺登][2]这样的隐私权倡导者建议使用它。
它可能没有 Telegram 或 WhatsApp 这么多的功能。但是,如果你想在交流时增强隐私,这是一个可靠的开源方案。
你可以在智能手机iOS][3]/[Android][4])上安装,也可以在 Linux、Windows 和 macOS 上安装。
### Signal 的功能
**注意:** _某些功能是智能手机特有的。你可能无法在桌面应用上看到所有功能。_
正如我已经提到的,这是为增强你的隐私而量身定制的。因此,用户体验可能不是你见过“最佳”的。但是,从隐私/安全角度考虑,我认为这是一个不错的选择。
![Signal Features][5]
#### 消失的消息
你可以为对话中的消息设置一个计时器,以便根据它自动删除消息。
本质上,对话中的任何人都可以激活此功能。因此,你可以控制对话中的消息时保留还是消失。
#### 用作默认短信应用
如果你想在短信中使用开源应用,那么只需口进入 Signal 的设置,并将其设置为短信和彩信的默认设置。
#### 屏幕安全
有一个巧妙的功能可以阻止应用内截图,它就是“屏幕安全”。
如果你开启它,那么你将无法为应用中的任何对话截图。你可以从应用设置中找到启用或禁用它的选项。
它可能并不是对所有人有用,但你可以尝试一下。
#### 安全数字
如果你想与朋友一起验证加密的安全性,只需点击个人资料并向下滚动找到“查看安全数字”。
你可以扫描验证或者看一眼并标记为已验证。
#### 锁定消息
如果你使用了锁(密码/指纹)来保护应用,那么即使你的设备已解锁,你也无法在通知中看到消息。
因此,当 Signal 处于锁定状态收到通知时,你会注意到通知的内容为 “**Locked Message**”,这对于注重隐私的用户来说是一个加分项。
#### 其它功能
![][6]
如你所期待的聊天应用,你可以使用几个标签,并且可以根据需要创建一个组。
但是,你无法管理你的组,你只能添加成员和更改群头像。
此外Signal 还为其应用支持生物识别。
### 在 Ubuntu/Linux 上安装 Signal
不幸的是,你无法在你的 Linux 发行版上找到 .**deb** 或者 .**AppImage**。因此,你需要根据[官方安装说明][7]在终端上安装。
在终端中输入以下内容:
```
curl -s https://updates.signal.org/desktop/apt/keys.asc | sudo apt-key add -
echo "deb [arch=amd64] https://updates.signal.org/desktop/apt xenial main" | sudo tee -a /etc/apt/sources.list.d/signal-xenial.list
sudo apt update && sudo apt install signal-desktop
```
只需在终端中一个接一个地复制并粘贴命令。
[Download Signal for Other Devices][7]
### 我对 Signal 的想法
我已经使用 Signal 有几年了,它的功能已经得到了改善。但是,我仍然认为可以改善用户体验。
在隐私方面,(在我看来)这绝对是我们已有软件的一个很好的替代方案。你可以尝试一下,看看它的使用效果如何。
如果你想尝试一下它,也可以看看它的 [GitHub 页面][8]以获取最新的开发和 beta 版本。
与 WhatsApp 甚至 [Linux 上的 Telegram][9] 相比Signal 可能不是流行的聊天应用。但是,你可以自己尝试一下,并鼓励你的朋友使用它。
你尝试过了吗?在下面的评论中,让我知道你对 “Signal” 的看法。
--------------------------------------------------------------------------------
via: https://itsfoss.com/signal-messaging-app/
作者:[Ankush Das][a]
选题:[lujun9972][b]
译者:[geekpi](https://github.com/geekpi)
校对:[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译,[Linux中国](https://linux.cn/) 荣誉推出
[a]: https://itsfoss.com/author/ankush/
[b]: https://github.com/lujun9972
[1]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/12/signal-shot.jpg?ssl=1
[2]: https://en.wikipedia.org/wiki/Edward_Snowden
[3]: https://apps.apple.com/us/app/signal-private-messenger/id874139669
[4]: https://play.google.com/store/apps/details?id=org.thoughtcrime.securesms&hl=en_IN
[5]: https://i1.wp.com/itsfoss.com/wp-content/uploads/2019/12/signal-phone.jpg?ssl=1
[6]: https://i2.wp.com/itsfoss.com/wp-content/uploads/2019/12/signal-shot-1.jpg?ssl=1
[7]: https://signal.org/download/
[8]: https://github.com/signalapp
[9]: https://itsfoss.com/install-telegram-desktop-linux/